Hi,

Both "Love has Brought Me to Despair" and "She's like the Swallow" are based on stanzas taken from "The Constant Lady and False-Hearted Squire," dated c.1686.

"The Constant Lady and False-Hearted Squire" is based on two broadsides printed on a single sheet: printed on a single sheet by the Assignes of Thomas Symcocke" c. 1628: "The Deceased Maiden Lover" and "The Faithlesse Lover." They can be viewed here:
https://ebba.english.ucsb.edu/ballad/30059/image

Then there's lutenist Robert Johnson's "A Forlorn Lover's Complaint" (As I walked forth one summer's day) which is four stanzas found in "The Deceased Maiden Lover." Johnson died in 1633 so it would seem that the nine stanza "The Deceased Maiden Lover" is an expansion based on Johnson's work.

Does anyone know if Johnson's tune is Bonny Nell? Or the date of Johnson's composition?

The Oxford Magazine, Volume 25 gives a date of 1610 and I've given it a date of c. 1611 based on earlier research which I can't find.

Richie